Honda Civic 2002-2003 Service Manual page 306

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19. Disconnect each of the components or the
connectors below, one at a time, and check for
continuity between PGM-FI main relay 1 4P
connector terminal No.1 and body ground.
• PGM-FI main relay 2
• ECM connector A (31 P)
• Each injector 2P connector
• Idle air control (lAC) valve 3P connector
• Camshaft Position (CMP) sensor B ITop dead
center (TDC) sensor) 3P connector
• Crankshaft position (CKP) sensor 3P connector
PGM·FI MAIN RELAY 1
4P CONNECTOR
/
IGPI
W
1
IYEL/B
2
13[XJ41
LKI
~
Q
=
Wire side of female terminals
Is there continuity?
YES-Go to step 20.
NO- Replace the component that made continuity
to body ground go away when disconnected. If the
item is the ECM, update the ECM if it does not have
the latest software, or substitute a known-good
ECM, then recheck Isee page 11-6). If the symptom/
indication goes away with a known-good ECM,
replace the original ECM.
Also replace the NO.6 ECU (ECM) (15 A) fuse.
20. Disconnect the connectors of all these components.
• PGM-FI main relay 2
• ECM connector A 131 P)
• Injectors
• Idle air control (lAC) valve
• Camshaft Position (CMP) sensor B (Top dead
center (TDC) sensor)
• Crankshaft position (CKP) sensor
21. Check for continuity between PGM-FI main relay 1
4P connector terminal No.1 and body ground.
PGM-FI MAIN RELAY 1
4P CONNECTOR
,
IGPI
m
1
lYE LIB
2
131XJ41
LKI
~
Q
=
Wire side of female terminals
Is there continuity?
YES-Repair short in the wire between the PGM-FI
main relay 1 and each item. Also replace the No.6
ECU IECM) (15A) fuse .•
NO-Replace the PGM-FI main relay 1. Also replace
the No 6 ECU IECMI115AI fuse .•
22. Inspect the No. 17 FUEL PUMP (15A) fuse in the
under-dash fuse/relay box.
Is the fuse OK?
YES-Go to step 34.
NO-Go to step 23.
23. Remove the blown No. 17 FUEL PUMP (15A) fuse
from the under-dash fuse/relay box.
24. Disconnect ECM connector E (31P).
lcont'dl
11-99